#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>

int count (int n) {
	int count = 0;
	while (n) {
		n = n & (n - 1);
		count++;
	}
	return count;
}


int main2() {
	int n = 0;
	scanf("%d", &n);
	int result = count(n);
	printf("%d", result);
	return 0;
}